M5R1 & M5R2 Mazda built Ford 5 Spd Transmission Shifter Retainer Boot/Seal Ford Part # E8TZ-7277A This is the retainer and seal combination that retains the shifter in the top cover and also acts as a seal around the shifter to prevent oil from leaking out of the transmission. This is a common problem with these models. The boot / seal breaks or cracks and allows fluid to leak out around the shifter. Over periods of time, with leakage from this boot, the transmission will become low on oil and eventually the unit will overheat and burn itself out. Will fit: M5R1 Ford Aerostar 1985 - 1995 Ford Explorer 1991 & up Ford Bronco II 1988 - 1990 Ford Ranger 1988 - Up Ford Explorer Sport & Sport Trac 2001 - 2002 M5R2 Ford Full Size Pick-up 1988 - up Ford Bronco 1988 - 1992 Ford Econoline 1988 - 1989 Identify this Transmission by Tag's on the side "E87A, E97A, FO7A, F17A " This Transmission has an Aluminum Case and an Aluminum Top Cover. Note it is called M5R1 or M5OD or Mazda Type.